Stop motion for looms



s M o O L L mm w H 0 w M P o T S Jan. 14, 1936.

Filed Sept. 19, 1955 Patented Jan. 14, 1936 mural) STATES PATENT OFFICE 4 Claims.

This invention relates to a stop motion for looms, and it is an object of the invention to provide means which can be quickly installed for stopping automatically the loom upon the dropping of a harness frame and thus prevent damaging of the cloth in process of manufacture and the resultant elimination of seconds.

Another object of the invention is to provide an improved device of this kind which can be readily adjusted or assembled as may be required in connection with wide or narrow frames.

An additional object of the invention is to provide an apparatus or device of this kind including a rod for coaction with a stop off motion bar of the loom and which rod is mounted in a manner to permit the same to be adjusted as may be required with respect to the bar.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved stop motion for a loom whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying draw,- ing, whereinz- V Figure 1 is a diagrammatic view partly in elevation and partly in broken lines illustrating apparatus or devices constructed in accordance with my invention in applied or working position and with a harness frame dropped at one end;

Figure 2 is also a diagrammatic view partly in end elevation and partly in broken lines illustrating in greater detail my improved apparatus or device, the section being substantially on the line 22 of Figure 1;

Figure 3 is an enlarged fragmentary view partly in section and partly in elevation of the lower portion of my improved apparatus or device as herein set forth;

Figure 4 is an enlarged fragmentary view partly in top plan and partly in section illustrating the means herein disclosed for holding in adjusted position the bar which contacts with the stop off motion bar of the loom.

In practice, one of my devices or apparatus A is positioned below each end portion of a harness frame F of a loom as is particularly illustrated in Figure 1 of the accompanying drawing and in which figure a frame F is shown as dropped at one end.

Each of my devices or apparatus as herein disclosed comprises a stand substantially in the form of a U. The intermediate member I of the stand is rested upon a floor or other surface in proper position below the end portion of a frame F and fixedly maintained in such position through the medium of the screws 2 or otherwise as preferred. The side arms 3 and 4 of the stand as herein disclosed are substantially in parallelism and the upper portion of the arm 4 has disposed therealong a slot 5 opening through the top of said arm 4.

Held to the inner face of the arm 3 by the clamps 6 is an elongated tubular member! open at both ends. The member I is of a length to extend a major distance up along the arm 3 of the stand with its lower end contacting with the intermediate member I.

Freely insertable from above within the tubular member 1 is an elongated rod 8 and interposed between the inserted end of the rod 8 and the member i of the stand is an expansible member 9, herein disclosed as a coil spring of desired length. This spring 9 is of a sufiicient tension to normally maintain the rod 8 projected a desired distance upwardly beyond the member I and the extent of such projection may be regulated or adjusted by employing members or springs 9 of varying lengths. In other words, should it be desired to have the rod 8 extend further above the member 1 than is illustrated, upon loosening of the clamps 6 the tubular member i can be raised sufliciently to permit the withdrawal of the spring 9 and the substitution therefor of a spring of greater length.

The upper or outer end of the rod 8 is con-V tinued by an elongated bar l0 disposed in a direction toward the arm 4 of the stand and of a length to extend through the open slot 5 of the arm 4 and to project a desired distance outwardly beyond said arm 4. This outer or free end portion of the bar I0 is threaded, as at H, and said threaded portion of the bar is provided therethrough with an opening I2 through which is inserted the lower end portion of an upstanding bar 14. The upper extremity of the bar I4 is provided with a laterally disposed extension or finger l5 which is adapted to contact from above with a stop off motion bar It to effect a stopping of the loom upon undue downward movement of the rod M as effected by contact resulting from the dropping of a frame F upon a bar It).

While the spring 9 within the lower portion of the tubular member 1 is sufficient to normally maintain the bar 10 in its proper position with respect to the frame F yet it is believed to be obvious that the tension of such spring is insufficient to withstand the downward movement of the rod 8 when a frame F drops upon the bar l0.

To facilitate the operation of the rod or member 8 in the tubular member I I provide the bar I ll inwardly of the member 8 but closely adjacent thereto with an adjustable stop I! herein disclosed as threaded upon the portion ll of the bar Hi. This stop I! by contact with the arm 4 of the stand will prevent undue lateral movement of the rod 8 under any tendency to overbalance by the bar it and which lateral movement would cause the member or rod 8 to have undue frictional contact with the tubular member I.

The side arms 3 and 4 of the stand are also maintained in their desired spaced relation by the interposed bracing strips l8.

If during the operation of a loom a frame F from any cause should drop, said frame will be received upon the bar ll resulting in sufiicient depression of the rod !4 to operate the stop off motion bar [8 sufficiently to effect a substantially instantaneous stopping of the loom. As this loom stop off mechanism in its detail forms no part of the present invention and is Well known it is believed a detailed explanation and illustration thereof is unnecessary. After the frame has been reset the spring 9 will cause the bar 10 together with the rod M to return to their normal position so that the operating of the loom can be resumed.

The bar II! in addition to serving as a support and operator for the rod I4 also provides a convenient gauge in the resetting of a frame.

In practice the frames F when effective will have a normal spacing say of a quarter of an inch above the bar In and, therefore, in resetting a frame it is only necessary for the operator to make such a replacement of the frame. Of course, this distance of a quarter of an inch may be varied as required. It is also highly important that the rod M be readily adjusted lengthwise to compensate for the varying distances between the rod I 0 and the stop ofi motion bar as may be required by the widening or narrowing of the harness frames.

As herein disclosed the lower end portion of the rod [4 is freely insertable through the opening l2 of the bar l0 and, said rod is effectively locked in desired endwise adjustment by tightening movement of the clamping nut 49 threaded upon the portion H of the bar Hi.

It is believed to be apparent that the open slot in the arm 4 permits the vertical adjustment of: the rod 8 without interference of the bar l0 and, furthermore, by having the bar I 0 extending through this slot it is assured that the bar it will be maintained in desired working position with respect to the arms 3 and 4.

From the foregoing description it is thought to be obvious that a stop motion for looms constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:-

1. A harness stop motion device comprising a stand to be placed under the harness frame of a. loom, said stand having upstanding spaced arms, a tubular member carried by one of the arms, a rod insertible from above within the tubular member, a bar carried by the upper extremity of the rod and substantially bridging the space between the upstanding arms, a spring within the tubular member below the rod for normally maintaining said rod and bar in a raised position,

a. stop off bar, and an upstanding rod carried by the bar having a part for engaging the stop off bar upon depression of the first named rod and bar, said bar being positioned below the harness to be contacted by a dropping frame.

2; A harness stop motion device comprising a stand to be placed under the harness of a loom, said stand having upstanding spaced arms, a tubular member carried by one of the arms, a rod insertible from above within the tubular member, a bar carried by the upper extremity of the rod and substantially bridging the space between the upstanding arms, a spring within the tubular member below the rod for normally maintaining. said rod and bar in a raised position, a stop off bar, an upstanding rod carried by the bar having apart for engaging the stop off bar upon depression of the first named rod and bar, said bar being positioned below the harness to be contacted by a dropping frame, said second named rodbeing endwise adjustablewith respect to the bar, and means for holding said second rod in its selected adjustment.

3; A harness stop motion device comprising a stand tobeplaced under the harness of a loom, said stand having upstanding spaced arms, a tubular member carried by one of the arms, a rod insertible from above within the tubular member, a bar-carried by the upper extremity of the rod andsubstantially bridging the space between the upstanding arms, a spring within the tubular member belowthe rod for normally maintaining said rod-and bar in a raised position, a stop off bar, an upstanding rod carried by the bar having a part for engaging the stop off bar upon depression of the first named rod and bar, said bar being positioned below the harness to be contacted by-a dropping frame,,the upper portion of the second rod of the stand having a slot therealong, the bar of the first rod extending through said slot;

4. A harness stop motion device comprising a stand to be placed under the harness of a loom, said stand having, upstanding spaced arms, a tubular member carried by one of the arms, a rod insertible from above within the tubular member, a bar carried by the upper extremity of the rod and substantially bridging the space between the upstanding arms, a spring within the tubular member below the rod for normally maintaining said rod and bar in a raised position, a stop off bar, an upstanding rod carried by the bar having a part for engaging the stop off bar upon depression of the first named rod and bar, said bar being positioned below the harness to be contacted by a dropping frame, and a stop adjustably engaged with the bar for coaction from within, with the second arm of the stand.

WILLIAM H. HILL. 

